tor-browser

The Tor Browser
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HTMLLegendElement.cpp (4666B)

      1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
      2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
      3 /* This Source Code Form is subject to the terms of the Mozilla Public
      4 * License, v. 2.0. If a copy of the MPL was not distributed with this
      5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
      6 
      7 #include "mozilla/dom/HTMLLegendElement.h"
      8 
      9 #include "mozilla/dom/ElementBinding.h"
     10 #include "mozilla/dom/HTMLLegendElementBinding.h"
     11 #include "nsFocusManager.h"
     12 #include "nsIFrame.h"
     13 
     14 NS_IMPL_NS_NEW_HTML_ELEMENT(Legend)
     15 
     16 namespace mozilla::dom {
     17 
     18 HTMLLegendElement::~HTMLLegendElement() = default;
     19 
     20 NS_IMPL_ELEMENT_CLONE(HTMLLegendElement)
     21 
     22 nsIContent* HTMLLegendElement::GetFieldSet() const {
     23  nsIContent* parent = GetParent();
     24 
     25  if (parent && parent->IsHTMLElement(nsGkAtoms::fieldset)) {
     26    return parent;
     27  }
     28 
     29  return nullptr;
     30 }
     31 
     32 bool HTMLLegendElement::ParseAttribute(int32_t aNamespaceID, nsAtom* aAttribute,
     33                                       const nsAString& aValue,
     34                                       nsIPrincipal* aMaybeScriptedPrincipal,
     35                                       nsAttrValue& aResult) {
     36  // this contains center, because IE4 does
     37  static constexpr nsAttrValue::EnumTableEntry kAlignTable[] = {
     38      {"left", LegendAlignValue::Left},
     39      {"right", LegendAlignValue::Right},
     40      {"center", LegendAlignValue::Center},
     41  };
     42 
     43  if (aAttribute == nsGkAtoms::align && aNamespaceID == kNameSpaceID_None) {
     44    return aResult.ParseEnumValue(aValue, kAlignTable, false);
     45  }
     46 
     47  return nsGenericHTMLElement::ParseAttribute(aNamespaceID, aAttribute, aValue,
     48                                              aMaybeScriptedPrincipal, aResult);
     49 }
     50 
     51 nsChangeHint HTMLLegendElement::GetAttributeChangeHint(
     52    const nsAtom* aAttribute, AttrModType aModType) const {
     53  nsChangeHint retval =
     54      nsGenericHTMLElement::GetAttributeChangeHint(aAttribute, aModType);
     55  if (aAttribute == nsGkAtoms::align) {
     56    retval |= NS_STYLE_HINT_REFLOW;
     57  }
     58  return retval;
     59 }
     60 
     61 nsresult HTMLLegendElement::BindToTree(BindContext& aContext,
     62                                       nsINode& aParent) {
     63  return nsGenericHTMLElement::BindToTree(aContext, aParent);
     64 }
     65 
     66 void HTMLLegendElement::UnbindFromTree(UnbindContext& aContext) {
     67  nsGenericHTMLElement::UnbindFromTree(aContext);
     68 }
     69 
     70 void HTMLLegendElement::Focus(const FocusOptions& aOptions,
     71                              const CallerType aCallerType,
     72                              ErrorResult& aError) {
     73  nsIFrame* frame = GetPrimaryFrame();
     74  if (!frame) {
     75    return;
     76  }
     77 
     78  if (frame->IsFocusable()) {
     79    nsGenericHTMLElement::Focus(aOptions, aCallerType, aError);
     80    return;
     81  }
     82 
     83  // If the legend isn't focusable, focus whatever is focusable following
     84  // the legend instead, bug 81481.
     85  nsFocusManager* fm = nsFocusManager::GetFocusManager();
     86  if (!fm) {
     87    return;
     88  }
     89 
     90  RefPtr<Element> result;
     91  aError = fm->MoveFocus(nullptr, this, nsIFocusManager::MOVEFOCUS_FORWARD,
     92                         nsIFocusManager::FLAG_NOPARENTFRAME |
     93                             nsFocusManager::ProgrammaticFocusFlags(aOptions),
     94                         getter_AddRefs(result));
     95 }
     96 
     97 Result<bool, nsresult> HTMLLegendElement::PerformAccesskey(
     98    bool aKeyCausesActivation, bool aIsTrustedEvent) {
     99  FocusOptions options;
    100  ErrorResult rv;
    101 
    102  Focus(options, CallerType::System, rv);
    103  if (rv.Failed()) {
    104    return Err(rv.StealNSResult());
    105  }
    106 
    107  // XXXedgar, do we need to check whether the focus is really changed?
    108  return true;
    109 }
    110 
    111 HTMLLegendElement::LegendAlignValue HTMLLegendElement::LogicalAlign(
    112    mozilla::WritingMode aCBWM) const {
    113  const nsAttrValue* attr = GetParsedAttr(nsGkAtoms::align);
    114  if (!attr || attr->Type() != nsAttrValue::eEnum) {
    115    return LegendAlignValue::InlineStart;
    116  }
    117 
    118  auto value = static_cast<LegendAlignValue>(attr->GetEnumValue());
    119  switch (value) {
    120    case LegendAlignValue::Left:
    121      return aCBWM.IsBidiLTR() ? LegendAlignValue::InlineStart
    122                               : LegendAlignValue::InlineEnd;
    123    case LegendAlignValue::Right:
    124      return aCBWM.IsBidiLTR() ? LegendAlignValue::InlineEnd
    125                               : LegendAlignValue::InlineStart;
    126    default:
    127      return value;
    128  }
    129 }
    130 
    131 HTMLFormElement* HTMLLegendElement::GetForm() const {
    132  const auto* fieldsetControl = nsIFormControl::FromNodeOrNull(GetFieldSet());
    133  return fieldsetControl ? fieldsetControl->GetForm() : nullptr;
    134 }
    135 
    136 JSObject* HTMLLegendElement::WrapNode(JSContext* aCx,
    137                                      JS::Handle<JSObject*> aGivenProto) {
    138  return HTMLLegendElement_Binding::Wrap(aCx, this, aGivenProto);
    139 }
    140 
    141 }  // namespace mozilla::dom